Two point masses are located a distance, d, apart. the gravitational force of attraction between them can be quadrupled by changing the distance to. a d/2 b.2d c. d/4 d.4d

What is the mass of the same rock on the earth

As you are trying to move a heavy box of mass m, you realize that it is too heavy for you to lift by yourself. there is no one around to , so you attach an ideal pulley to the box and a massless rope to the ceiling, which you wrap around the pulley. you pull up on the rope to lift the box. use g for the magnitude of the acceleration due to gravity and neglect friction forces. once you have pulled hard enough to start the box moving upward, what is the magnitude f of the upward force you must apply to the rope to start raising the box with constant velocity? express the magnitude of the force in terms of m, the mass of the box.

Which type of energy would have nothing to do with ironing clothes? a. heat b. chemical c. electrical d. mechanical